34 results about "Aortic stent" patented technology

The invention discloses an aorta covered stent and an aorta covered stent assembly, and belongs to the technical field of medical instruments. The aorta covered stent comprises a main covered stent body and branch covered stents; a mounting opening is formed in the main body covered stent; the branch covered stent comprises an outer port and an inner port, the side, close to the upstream, of the edge of the outer port is connected with the mounting port through a first membrane, and the first membrane is provided with a first outer convex face and a first inner concave face which are oppositely arranged; one side, close to the downstream, of the edge of the inner port is connected with the mounting port through a second membrane, and the second membrane is provided with a second outer convex surface and a second inner concave surface which are oppositely arranged; the first membrane and the second membrane are connected through the third membrane, and the first membrane, the second membrane and the third membrane seal the installation opening. The assembly comprises a connecting covered stent and the aorta covered stent. The aorta covered stent which does not need to cut the healthy blood vessel of a patient, and is wide in application range, high in flexibility and small in compression occupied space can be formed.

The invention discloses an aorta valved conduit with a coronary artery bridging vessel, comprising: an ascending aorta prosthesis comprising an ascending aorta stent; the valve prosthesis comprises a valve support and a valve blade, the valve support is coated with a valve covering film, and a bridging port used for bridging the coronary artery bridging blood vessel prosthesis or the coronary artery bridging blood vessel prosthesis communicated with the interior of the valve prosthesis is arranged on the valve covering film; the guide stent comprises at least one group of connecting rib units, the connecting rib units are connected with the ascending aorta stent and are arranged along the longitudinal direction of the ascending aorta stent, and one end of each connecting rib unit is connected with the valve stent so as to restrain the bending direction of the ascending aorta stent; the ascending aorta stent can only be bent along the plane where the connecting rib units and the central axis of the ascending aorta stent are located. The covering film is arranged outside the valve prosthesis in a covering mode, it is guaranteed that blood in the valve prosthesis cannot leak, and the coronary artery bridging blood vessel prosthesis is connected to the valve prosthesis so that the interior of the valve pipeline can be communicated with coronary artery blood flow.

The invention discloses an intrusive aorta valved conduit, comprising: an ascending aorta prosthesis comprising an ascending aorta stent, and an ascending aorta covering film covering the ascending aorta stent, so that the ascending aorta prosthesis can be adapted to the inner wall of the ascending aorta and form a sealing fit with the inner wall of the ascending aorta; the valve prosthesis comprises a valve support and a valve blade. Comprising at least one group of connecting rib units, the connecting rib units are connected with the ascending aorta stent and arranged in the longitudinal direction of the ascending aorta stent, and one ends of the connecting rib units are connected with the valve stent to restrain the bending direction of the ascending aorta stent; the ascending aorta stent can only be bent along the plane where the connecting rib units and the central axis of the ascending aorta stent are located. Through the arrangement of the connecting ribs, the angle of the valved pipeline in the input process can be controlled, so that the bending direction of the valved pipeline in the in-vivo conveying process is accurately controlled, the implantation angle of the instrument is convenient to adjust and control, the instrument can be accurately aligned with the boundary edge of a native valve leaflet, and the implantation precision of the valved pipeline is guaranteed.

The present invention provides an individualized thoracic aortic stent system. The individualized thoracic aortic stent system includes an aortic arch stent and an ascending aortic stent. The anchoring area of the aortic arch stent is spliced and implanted into the ascending aortic stent, and the anchoring area of the ascending aortic stent is used as the anchoring area of the system. A first branch hole is pre-opened in the area of the aortic arch stent for connecting a branch stent, and the opening areas of the second branch hole and the third branch hole are locked with the first branch hole as a reference point, and the second branch hole and the third branch hole are opened in the opening areas. A movable, deformable or special-shaped framework structure is arranged in the opening area of the aortic arch stent. Through the splicing between the aortic arch stent and the ascending aortic stent, the anchoring area of the aortic arch stent is arranged in the ascending aortic arch stent, and the anchoring area of the ascending aortic stent is used as the anchoring area of the system, so that the anchoring area is moved forward to avoid the vascular branch fork, enabling the system to adapt to individuals who were previously unsuitable for anchoring.

The present disclosure provides a stent for an aorta, the stent having a longitudinal axis defined between a first end and a second end of the stent. In the radially expanded state, the second end has an oval cross-sectional shape in a plane perpendicular to the longitudinal axis. The stent comprises first and second radiopaque markers. There is also provided a stent system comprising the stent for an aorta as a first stent, and a second stent for crossing over the common iliac arteries. The second stent has an aperture between its first and second ends, and the first stent is configured to couple to the second stent. A method of implanting the stent is provided. A method of implanting the stent system is also provided.

The invention discloses an aorta covered stent and an aorta stent system, and belongs to the technical field of medical instruments.The aorta covered stent comprises a tubular covered film, end outer wave-shaped stents are arranged on the outer walls of the two ends of the tubular covered film, and an end inner wave-shaped stent is arranged on the inner wall of at least one end; the wave troughs of the end inner wave-shaped stent are fixedly connected with the end of the tubular covering film, the wave crests and the wave crests of the end outer wave-shaped stent are arranged in a staggered mode, and the connecting beams connecting the wave crests and the wave troughs are slidably connected to the end of the tubular covering film at intervals. The aorta stent system comprises a stent conveying system and an aorta covered stent. The stent conveying system comprises a conveying catheter and a stent conveyor. After the end part of the aorta covered stent is compressed, the wave crest of the wave-shaped stent in the end part can extend out of the port of the tubular covered stent to be hooked and loaded with a stent conveying system; after the aorta covered stent is released, the wave crests of the corrugated stent in the end part can be shrunk into the tubular covered stent, so that stimulation to aorta blood vessels is avoided.

The internal leakage prevention structure comprises a plurality of separation blade single bodies arranged on the outer surface of the covered stent, each separation blade single body comprises a separation blade main body and a supporting wire, the separation blade main body is in a blade shape or a flipper shape, a roughening structure is arranged on the surface of the separation blade main body, and the supporting wire is arranged on the surface of the separation blade main body. One end of the support wire is connected with the catch main body, and the other end of the support wire is fixedly connected with the covered stent; a certain included angle is formed between the blocking piece single bodies and the side wall of the covered stent, part of the blocking piece single bodies are arranged around a pre-windowing hole of the covered stent, the rest of the blocking piece single bodies are arranged on the outer surface of the covered stent in a multi-position scattered mode, and the multiple blocking piece single bodies integrally form a breakwater-shaped structure. After the speed of leaked blood flow is reduced, thrombus is slowly generated, the leaked blood flow is naturally blocked, and therefore the probability of internal leakage is reduced.

Techniques and features to reduce air that may be released during deployment of an endoluminal device (e.g., a thoracic aortic stent graft device). In addition, methods for quantifying the effectiveness of pre-treatment techniques and features that reduce such air are discussed herein. This air reduction may help reduce the risk of air embolism occurring during deployment of a device (e.g., an implant, e.g., a stent graft), which may potentially reduce the risk of negative effects caused by such embolism.

A system and method of remote guidance and alignment for endovascular fenestration of a vascular prothesis placed intraluminally that includes a flexible magnetic guide sheath having a magnetic distal end. An implantable magnetic stent for intraluminal placement in proximal end of a target artery providing magnetic guidance outside the endovascular aortic stent graft prothesis for accurate aperture formation in the vascular prothesis for subsequent placement of covered branch stents thereto.

An implantable medical device including a frame operable to transition between a delivery configuration and a deployed configuration, a tubular member supported by the frame and defining a side wall, wherein the tubular member defines a lumen extending therethrough and at least one fenestration defined by the side wall, and a valve supported by the frame and positioned upstream from the at least one fenestration when implanted in an ascending aorta.

The invention relates to a novel aortic stent and a manufacturing method thereof. The novel aorta stent comprises a near-end stent section, a far-end stent section, an arch stent section, a covering film and a keel line, the near-end stent section is used for being implanted into a descending aorta, the far-end stent section is used for being implanted into an ascending aorta, and the arch stent section is used for being implanted into an aortic arch. The arch support section is located between the near-end support section and the far-end support section and connected with the near-end support section and the far-end support section. The covering film covers the near-end stent section and the far-end stent section. Wherein the near-end stent section, the arch stent section and the far-end stent section jointly define a supporting cavity, the covering film has foldability, and the keel line has a pre-bent shape. According to the novel aortic stent, the whole stent can achieve the bending effect in the keel line bending direction, so that the elastic straightening force of the novel aortic stent can be reduced, the flexibility of the novel aortic stent is improved, and complications caused by poor wall attachment are reduced.

The utility model discloses an aorta abdominalis covered stent and a stent system, and belongs to the technical field of aorta abdominalis covered stents. The utility model provides an aorta abdominalis covered stent which comprises a stent body, and a first through hole, a second through hole and a third through hole are formed in the stent body in the longitudinal direction of a cylinder. The middle section of the support body is provided with an open groove, the second through hole and the third through hole are broken through the open groove, and the first through hole is not broken through the open groove. Therefore, according to the aorta abdominalis covered stent, the aorta abdominalis stent can be communicated with the four branch arteries. The first through hole is not affected by the open groove and penetrates through the stent body, and therefore it can be guaranteed that blood in the aorta abdominalis is smooth all the time. The slotting does not need to be customized according to the condition of a patient, and professional batch production can be realized, so that the manufacturing efficiency and the use reliability are improved.

The invention relates to the technical field of intravascular stents, and discloses an aortic stent and an aortic stent split conveying device.The aortic stent comprises a first stent section, a second stent section and a connecting piece, one end of the first stent section is arranged in one end of the second stent section in a sleeved mode, and the connecting piece is connected between the first stent section and the second stent section; the traction device is used for pulling the second stent section which expands before the first stent section, and when the first stent section and the second stent section are both in the expansion state, the part, located in the second stent section, of the first stent section abuts against the second stent section. The split conveying device comprises an inner core and an outer sheath, the outer sheath comprises a first sheath section and a second sheath section which are movably arranged outside the inner core in a sleeving mode, and the second support section and the first support section are sequentially released by moving the first sheath section and the second sheath section back to back. The release stability and accuracy are better, and the risk of injury to the blood vessel wall is smaller.

Devices, systems, and methods for coupling a prosthetic implant to an open window are disclosed herein. In some embodiments, a branch stent graft is provided. The branch stent graft may include an engagement portion for engagement with an opening in an open window, such as a vascular wall or aortic stent graft. The engaging portion of the branch stent graft may be coupled to the open window such that the branch stent graft may be moved, rotated, or displaced relative to the open window, but such that axial movement of the branch stent graft is limited and / or prevented.

The application relates to an aortic stent and a manufacturing method thereof. The manufacturing method of the aortic stent comprises the following steps: providing a proximal stent section for being implanted into a descending aorta, a distal stent section for being implanted into an ascending aorta, and an arch stent section for being implanted into an aortic arch; providing a foldable covering film; covering the covering film on the proximal stent section and the distal stent section; providing a keel line with a pre-bent shape; and penetrating the keel line through the proximal stent section, the arch stent section and the distal stent section; wherein the proximal stent section, the arch stent section and the distal stent section jointly define a supporting cavity, the covering film is foldable, and the keel line has the pre-bent shape. The whole stent can be bent along the bending direction of the keel line, so that the elastic straightening force of the aortic stent itself can be reduced, the flexibility of the aortic stent is improved, and the complications caused by poor adhesion are reduced.

Devices, systems, and methods for patient-specific, custom-designed fenestrated implants. Various examples involve abdominal aortic stent-grafts with custom-designed fenestration features for perfusion of the renal arteries, mesenteric arteries, and / or celiac trunk arteries.

The present application relates to cardiovascular disease medical equipment technical field, disclose a kind of aortic covered stent, the aortic covered stent includes support stent, closure layer and elastic connecting layer, closure layer is spaced apart and is set to the outer periphery of support stent, closure layer includes first covering, elastic connecting layer is connected between support stent and closure layer, blood flow can flow between support stent and closure layer;With aortic pulsation, closure layer and elastic connecting layer produce elastic deformation, so that first covering is always close to aortic and the blood vessel wall adjacent to closure layer.The aortic covered stent can be better applied to the special form of ascending aortic dissection and the mechanical characteristics of blood flow, higher stability, better closure for ascending aortic wall.

The invention discloses an ascending aorta stent, which belongs to the field of medical instruments and comprises a stent bottom, a stent middle and a stent top. A plurality of closable split ring structures are arranged at the connecting ends, connected with the support middle part, of the support bottom part and the support top part, a plurality of connecting parts are arranged at the two ends of the support middle part, and the support middle part is connected with the support bottom part and the support top part through the connection of the connecting parts and the closable split ring structures; the net weaving part in the middle of the support is formed by weaving one silk thread, the connecting parts used for being connected with the top and the bottom of the support are formed at the two ends of the net weaving part, and the closable split ring structures are evenly distributed on the top and the bottom of the support. Compared with an existing method that knitting is directly conducted on the top or the bottom of the support, the efficiency is higher.

The invention relates to a stent for placement at an aortic annulus that is expandable from an undeployed state to a deployed state comprising a stent frame having rows of cells with a proximal section and a distal section at a longitudinal axis of the stent, the stent frame being formed by a plurality of arms, the arms being connected to one another at connection points, and wherein the plurality of arms forms a plurality of diamond-shaped stent cells, in particular the rows of cells, formed of vertices at said connection points between the arms, a dry valve made out bovine pericardium arranged at least at the distal section of the stent with the dry bovine pericardium being configured to be rehydrated with a solution, a skirt surrounding the dry valve and comprising at least one of bovine pericardium and polyester, and one or more eyelets arranged at a distal end of some of the arms, with the eyelets being configured to fix the valve to the stent frame.

The invention discloses an aortic stent graft system and device for reconstructing an aortic arch upper branch, and relates to the technical field of medical instruments. The branch stent is arranged close to the proximal end of the main stent and is used for reconstructing a head-arm trunk artery; the net-shaped window structure is arranged at the telecentric end, close to the starting part of the branch stent, of the side wall of the main stent, and the net-shaped window structure is used for follow-up operation of reconstructing the left subclavian artery; a window structure is formed in the side wall of the main body stent, is located between the branch stent and the net-shaped window structure and is used for arranging a short stent, and the short stent is used for reconstructing the left common carotid artery. An aorta disease lesion part can be repaired through a total femoral artery approach, the near-end anchoring area is moved forwards to the brachial trunk artery, and the brachial trunk artery, the left common carotid artery and the left subclavian artery are subjected to intracavitary reconstruction which completely conforms to a physiological anatomical structure and is along the blood flow direction by being combined with the integrated single branch stent in a telescopic mode.

The present invention discloses an aortic stent graft and an aortic stent graft assembly, belonging to the field of medical device technology. The aortic stent graft includes a main stent graft and a branch stent graft; the main stent graft is provided with a mounting port; the branch stent graft includes an external port and an internal port, the edge of the external port near the upstream side is connected to the mounting port through a first diaphragm, the first diaphragm has a first outer convex surface and a first inner concave surface arranged oppositely; the edge of the inner port near the downstream side is connected to the mounting port through a second diaphragm, the second diaphragm has a second outer convex surface and a second inner concave surface arranged oppositely; the first diaphragm and the second diaphragm are connected by a third diaphragm, and the first diaphragm, the second diaphragm and the third diaphragm seal the mounting port. The assembly includes a connecting stent graft and the above-mentioned aortic stent graft. It can form an aortic stent graft that does not require opening the patient's healthy blood vessels, has a wide range of applications, is highly flexible, and takes up little compressed space.

A minimally invasive circulatory support platform that utilizes an aortic stent pump or pumps. The platform uses a low profile catheter-based techniques and provides temporary and chronic circulatory support depending on the needs of the patient. Further described is a wirelessly powered circulatory assist pump for providing chronic circulatory support for heart failure patients. The platform and system are relatively easy to place, have higher flow rates than existing systems, and provide improvements in the patient's renal function.

The application provides an aortic stent releasing device for a vascular endovascular intervention robot, which comprises a driving mechanism, a control mechanism and an aortic stent, wherein the aortic stent comprises a stent base and a releasing handle; the stent base has a mounting end and a driving end; a self-expanding stent is sleeved on the mounting end, and a tightening sleeve is sleeved outside the self-expanding stent; the releasing handle is sleeved on the first position of the driving end; the driving mechanism can drive the releasing handle to move towards the second position of the driving end, so that the tightening sleeve is separated from the self-expanding stent, the self-expanding stent is self-expanded, and the mounting end is separated from the self-expanding stent when the stent base moves away from the self-expanding stent; and the control mechanism is signal-connected with the driving mechanism. The aortic stent releasing device uses a power device to replace human hands to complete stent releasing, reduces the operation risk caused by human factors, is simple to operate, stable and reliable, and has high practicability.

The invention discloses an aorta covered stent structure design method based on mechanical property multi-objective optimization, which comprises the following steps: performing parametric modeling based on key geometric parameters of a covered stent to obtain different stent models; simulating pressing and bending processes through finite element simulation to obtain radial supporting force and straightening force, enabling the radial supporting force to be equivalent to uniformly distributed pressure on the outer surface of the stent, and fitting to obtain a pressure-radius relationship of each stent model; calculating a blood vessel pressure-displacement relation without a stent based on a Lame formula, and iterating to obtain the compliance of a stent-blood vessel combination; performing multi-objective optimization on the radial supporting force, the straightening force and the stent-blood vessel combination compliance by adopting a multi-objective optimization method based on a genetic algorithm to obtain different stent design parameters; through stent release finite element simulation and hemodynamics simulation, the effects in the aspects of vascular wall stress distribution and hemodynamics are verified, the influence on the heart afterload is evaluated, and the structural design of the aorta covered stent is completed.

This invention relates to an in-situ vascular puncture sheath, comprising a hollow tube body. The hollow tube body has two corresponding side holes on its two opposite sidewalls near its front end, each hole penetrating the inner and outer surfaces of the tube body in the same radial direction. Each side hole also has a lateral slit at its front end, connecting to the side hole and extending forward. The two slits, starting from the top of the front end of the side hole and extending forward, gradually slope towards the same side of the hollow tube wall until they merge to form a guidewire release slit, facilitating guidewire disengagement from the hollow tube body. The opening width of the lateral slit and the guidewire release slit is equal to or slightly larger than the diameter of the guidewire used to pass through the two side holes. By positioning the side holes of the in-situ vascular puncture sheath at the branch vessel opening using a guidewire, in-situ puncture and fenestration of the aortic stent graft at the branch vessel opening can be performed through the opposite side hole. This method offers advantages such as accurate fenestration positioning, convenient surgical operation, and avoidance of arterial damage.

The utility model provides an in-vivo bypass device for an aortic stent arch windowing, and belongs to the technical field of medical instruments. The in-vivo bypass device for the aortic stent arch fenestration comprises a sheath seat and a sheath tube, the lower end of the sheath base is communicated with a sheath body, and the side wall of the sheath base is communicated with a flushing pipe; the sheath tube is connected with the sheath body through a connecting part, a first inclined hole is formed in the upper end of the sheath tube, a bent tip is arranged at the lower end of the sheath tube, a bottom hole is formed in the bent tip, a first side hole is formed in the side wall of the lower end of the sheath tube, and a second side hole is formed in the side wall of the upper section of the sheath tube; compared with in-vitro bypass adopted in the prior art, blood supply from the femoral artery is not needed, the problem that a bypass pipeline is long is solved, the operation effect is improved, the burden of medical care is relieved, blood in-vivo bypass is formed to supply blood to the brain, an operator has sufficient time to conduct in-vivo stent in-situ windowing, safety is greatly improved, and convenience and safety are provided for the operation.

The invention discloses a structure-programmable polylactic acid self-expanding aortic stent, which is characterized in that an integrated programmable structure design is carried out on a stent skeleton by utilizing a hyperelastic material, and the structure-programmable polylactic acid self-expanding aortic stent comprises an elastic constraint support area, a non-constraint area and a full-elastic constraint area which are sequentially arranged from a near end to a far end; the hyperelastic body and the stent skeleton material are both biodegradable polymer materials; the stent skeleton is formed by weaving high-performance monofilaments, the elastic constraint supporting area of the stent is located in the ascending aorta, the non-constraint area of the stent is located in the aortic arch, and the full-elastic constraint area of the stent is located in the descending aorta. Sufficient radial support can be effectively provided for the damaged area of the aortic dissection, it is ensured that good lumen compliance and sufficient blood supply are achieved in the aortic arch area, and meanwhile good wall attaching capacity can be kept in the descending aorta so as to prevent the aortic dissection from shifting. After the blood vessel is repaired, the stent is gradually degraded, so that a series of complications caused by implantation are eliminated, and treatment conditions are improved for patients.

The present invention relates to the field of medical device technology, and discloses a functional aortic arch in situ fenestration special covered stent, the proximal end of the aortic covered stent is provided with 2-3 Z-shaped wave stent rings (proximal Z-shaped wave stent ring group), the distal end is provided with 3-4 Z-shaped wave stent rings (distal Z-shaped wave stent ring group), the middle section of the aortic covered stent is provided with a saddle-shaped metal stent ring, the aortic stent is fully covered with a coating, the coating is provided with a mesh-like reinforcing wire, the outer peripheral side of the coating of the first Z-shaped wave stent ring of the proximal Z-shaped wave stent ring group is wrapped with a sponge-like structure, and the inside of the mesh reinforcing wire is provided with mutually cooperating latitudes and warps. The present invention mainly provides a special covered stent for in situ fenestration for in situ fenestration technology, which improves the success rate of fenestration, reduces the probability of stenosis caused by compression of the branch stent by the angle of the metal ring, reduces the damage of the proximal end of the stent to the aortic wall, and reduces the risk of recurrent dissection at the proximal end.

This application relates to the field of stent fenestration, and particularly to a method, device, equipment, system and medium for extracorporeal fenestration of a stent. The method includes: obtaining a guide plate diagram generated based on the aortic image data of a patient, which can accurately indicate the positions of branch openings; dividing regions according to the branch openings in the guide plate diagram; by projecting the first region of the guide plate diagram onto the aortic stent, the positions of the reference artery openings and the proximal end markings can be accurately located, so as to facilitate the stent fenestration operation according to the projected image. Since the stent is not planar, but a cylindrical or conical shape corresponding to the aortic shape selected based on the aortic image data of the patient, a single projection may not accurately project all branch openings. Then, by adjusting the projection angle, drilling of all regions on the aortic stent is gradually completed, improving the accuracy and efficiency of extracorporeal fenestration of the stent.

The application discloses a kind of aortic stent plane automatic positioning and related index measurement method. Obtain postoperative patient three-dimensional medical image data and carry out standardization processing;Identify and segment aortic stent and its related anatomical structure, extract stent three-dimensional point set;Determine horizontal reference plane and longitudinal reference plane based on point cloud spatial distribution, and position stent bottom / top plane accordingly;Combine coronary artery opening position to construct coronary plane, generate parallel section between stent bottom plane and coronary reference plane and determine Waldeyer's sinus plane;The intersection of the plane and image data obtains two-dimensional section, calculates the area, perimeter and other geometric indexes of stent and aortic section and outputs result.The method realizes postoperative key plane automatic positioning and quantitative measurement, improves evaluation efficiency and consistency.